Nissens 996267 Engine Coolant Reservoir

Engine Coolant Reservoir for BMW X3 and X4

This Nissens engine coolant reservoir is a pressurized plastic replacement tank built for BMW cooling systems that require level monitoring and a fitted cap. It is specified for 2011-2017 BMW X3 and 2015-2018 BMW X4 applications, with OE-style details that support direct replacement service.

• Brand: Nissens
• Part number: 996267
• Material: plastic
• Pressurized reservoir design
• Cap included; cap type: high quality plastic
• Level sensor included
• Mounting bracket included
• Capacity: 1.35L

Built for Cooling System Service

Nissens 996267 is an engine coolant reservoir engineered for BMW X3 and BMW X4 cooling system repair where the expansion tank, cap, and level sensor interface are part of the original setup. Nissens develops thermal management components to high manufacturing standards, and this reservoir follows that approach with a plastic construction, pressurized design, and integrated mounting bracket for a cleaner replacement on the vehicle.

This part cross-references BMW OE numbers 17137639464 and 17137823544 for the same application.

What It Helps Fix

• Cracked or leaking coolant reservoir housing
• Low coolant warnings caused by a faulty level sensor
• Pressure loss from a worn reservoir cap or tank seal area
• Cooling system service issues on BMW X3 and BMW X4 models
• Reservoir mounting concerns when the original bracket is damaged

Installation Notes and Tips

Verify the reservoir shape, sensor connection, and cap style against the original unit before installation. Transfer or connect the cooling system components according to the vehicle service procedure, then refill and bleed the system to remove trapped air. Inspect hoses, clamps, and adjacent plastic fittings for age-related wear while the system is open.

Quality Assurance

Nissens positions this reservoir within its Genuine Nissens Quality standard, reflecting the brand’s focus on thermal and engine efficiency components for the aftermarket. Part number 996267 is built as a direct-fit replacement for the listed BMW X3 and BMW X4 applications.